Abstract: A projection system and a projection method are provided. The projection system includes a first projector and a second projector. A first projection image projected by the first projector and a second projection image projected by the second projector are partially overlapped. A projection region edit menu is executed to display multiple adjustment points and multiple connecting lines on the first projection image. A position of a selected adjustment point among the multiple adjustment points and positions of two connecting lines connected to the selected adjustment point among the multiple adjustment points displayed on the first projection image are changed according to a first moving instruction to select a closed region formed by the multiple connecting lines in a non-overlap region of the first projection image. The projection method is adapted to the projection system that provides a blending projection effect of multiple projectors having an even brightness.

Abstract: A projection system and a projection method are provided. The projection system includes a first projector and a second projector. A first projection image projected by the first projector and a second projection image projected by the second projector are partially overlapped. A projection region edit menu is executed to display multiple adjustment points and multiple connecting lines on the first projection image. A position of a selected adjustment point among the multiple adjustment points and positions of two connecting lines connected to the selected adjustment point among the multiple adjustment points displayed on the first projection image change according to a first moving instruction to select a closed region formed by the multiple connecting lines in a non-overlap region of the first projection image. The projection method is adapted to the projection system that provides a blending projection effect of multiple projectors having an even brightness.

Abstract: A projection positioning system and a projection positioning method thereof are provided. A projection device projects a first test image and a second test image on a projection screen based on a projection range at different time points. At least one photosensitive element is disposed on the projection screen. In response to projecting the first test image, a computing device divides a first image sub-zone of the first test image according to the first image sub-zone corresponding to one of first optical parameters sensed by the photosensitive element, to generate the second test image. In response to projecting the second test image, the computing device determines positioning information of the photosensitive element with respect to the projection range according to a second image sub-zone corresponding to one of second optical parameters sensed by the photosensitive element. The projection device performs a projection adjustment function according to the positioning information.

Abstract: A projection positioning system and a projection positioning method thereof are provided. A projection device projects a first test image and a second test image on a projection screen based on a projection range at different time points. At least one photosensitive element is disposed on the projection screen. In response to projecting the first test image, a computing device divides a first image sub-zone of the first test image according to the first image sub-zone corresponding to one of first optical parameters sensed by the photosensitive element, to generate the second test image. In response to projecting the second test image, the computing device determines positioning information of the photosensitive element with respect to the projection range according to a second image sub-zone corresponding to one of second optical parameters sensed by the photosensitive element. The projection device performs a projection adjustment function according to the positioning information.

Abstract: A projection calibration system and a projection calibration method thereof are provided. A projection device projects test pictures onto a projection screen. Each test picture includes a pattern. A plurality of photosensitive elements are disposed on a frame of the projection screen and measure brightness sensing information when the projection device projects each test picture. In response to the pattern being changed from a first position in a first test picture to a second position in a second test picture, the brightness sensing information is changed from a first sensing value to a second sensing value. In response to the brightness sensing information being changed from the first sensing value to the second sensing value, a computing device determines picture boundary parameters according to the first position. The projection device performs image scaling according to the picture boundary parameters to project a calibrated picture aligned with the frame.

Abstract: An electronic whiteboard system, an operating method and an electronic whiteboard are provided. The electronic whiteboard system includes an electronic whiteboard and an electronic device. The electronic whiteboard includes a functional area. The electronic device is coupled to the electronic whiteboard and includes a display. The electronic whiteboard receives a touch input to generate coordinate information corresponding to the touch input. The electronic whiteboard transmits the coordinate information to the electronic device. The electronic device receiving the coordinate information determines whether the coordinate information is located in the functional area of the electronic whiteboard. If yes, the electronic device executes a function corresponding to the coordinate information. If not, the electronic device displays the touch input corresponding to the coordinate information on the display.

Abstract: A touch display system, a touch device and a touch display method are provided. A first touch tool and a second touch tool are communicated with to determine whether the first touch tool and the second touch tool are enabled within an enable area. When at least one of the first touch tool and the second touch tool is enabled within the enable area, a touch light curtain generating unit is controlled to stop generating a light curtain. When the first touch tool and the second touch tool are all enabled, the first touch tool and the second touch tool are controlled to sequentially emit invisible lights, so as to determine touch positions of the first touch tool and the second touch tool, by which misjudgment of the touch positions is effectively avoided.

Abstract: A projection screen includes a plurality of projection plates and at least one fixing component. Each of the projection plates has a projection surface and at least one connection side. Through the connection sides, the projection surfaces of the projection plates lean against each other to be coplanar. The fixing component includes two fixing sections connected with each other, wherein the two connection sides leant against each other are clipped at the two fixing sections, respectively.

Abstract: An interactive projection system and a projection method thereof are provided. The interactive projection system includes a projection region, a projection device, a touch device and a host. The touch device is movably disposed on the projection region. The projection device projects a corresponding input interface on a touch sensing surface of the touch device according to a position of the touch device, so as to improve usage convenience of the projection system.

Abstract: A projection screen includes a plurality of projection plates and at least one fixing component. Each of the projection plates has a projection surface and at least one connection side. Through the connection sides, the projection surfaces of the projection plates lean against each other to be coplanar. The fixing component includes two fixing sections connected with each other, wherein the two connection sides leant against each other are clipped at the two fixing sections, respectively.

Abstract: A gesture interactive operation method includes: receiving image information, about a hand part and provided by an image sensor, when the hand part is located within a sensing range of the image sensor; defining, through an image processor, a space relationship among sequentially-adjacent first, second and third fingers of the hand part in the image information; and analyzing the image information to generate first or second initiation signal and initiating to execute first or second operating mode on the display screen, respectively. The first initiation signal corresponds to the image information indicating that the second and third fingers are physically contacted with each other and the second finger is not physically contacted with the first finger. The second initiation signal corresponds to the image information indicating that the first and second fingers are physically contacted with each other and the second finger is not physically contacted with the third finger.

Abstract: A touch input accessory for being mounted onto a writing device includes a sleeve portion for being inserted therein a portion of the penholder at the end having the writing tip; a conductive touch head, made of a conductive material, connected to the sleeve portion, and including an opening so that when the sleeve portion is sleeved onto the penholder, the writing tip is enveloped by the conductive touch head, and the nib of the writing tip is protruded from the opening; and a contact conductive portion disposed on the sleeve portion and electrically connected to the conductive touch head, so that when a user holds the writing device and contacts the contact conductive portion to form an entity handwriting on the writing surface, the conductive touch head simultaneously contacts the writing surface to form a corresponding electronic handwriting.

Abstract: A touch display system, a touch device and a touch display method are provided. A first touch tool and a second touch tool are communicated with to determine whether the first touch tool and the second touch tool are enabled within an enable area. When at least one of the first touch tool and the second touch tool is enabled within the enable area, a touch light curtain generating unit is controlled to stop generating a light curtain. When the first touch tool and the second touch tool are all enabled, the first touch tool and the second touch tool are controlled to sequentially emit invisible lights, so as to determine touch positions of the first touch tool and the second touch tool, by which misjudgment of the touch positions is effectively avoided.

Abstract: An interactive projection system and a projection method thereof are provided. The interactive projection system includes a projection region, a projection device, a touch device and a host. The touch device is movably disposed on the projection region. The projection device projects a corresponding input interface on a touch sensing surface of the touch device according to a position of the touch device, so as to improve usage convenience of the projection system.

Abstract: An interactive display system includes a video disposition circuit, a display module, an event detection module, an event processing circuit, and a position determination circuit. The video disposition circuit receives different video frames of video source apparatuses, disposes the video frames in a display frame, and outputs frame disposition information. The display module receives and displays the display frame. The event detection module senses an interactive event in the display frame and generates a detection signal. The event processing circuit generates interactive position information according to the detection signal. The position determination circuit selects a corresponding video source apparatus from the video source apparatuses according to the interactive position information and the frame disposition information, and sends event coordinate data corresponding to the interactive position information to the corresponding video source apparatus.

Abstract: The invention describes a display system and a display method thereof. The display system includes a display apparatus, a light emitting apparatus, a light sensing apparatus and a processing unit. The display apparatus displays a main frame. The light emitting apparatus emits a light beam to the main frame and forms a light spot on the main frame. The light sensing apparatus senses the light spot. The processing unit couples a first display apparatus to the light sensing apparatus. The processing unit identifies the light spot according to optical characteristics of the light spot and positions a location of the light spot on the main frame according to a result of sensing the light spot.

Abstract: A touch apparatus and a touch sensing method thereof are provided. Touch information generated according to received scanning beams is returned by a touch tool, and coordinates of the touch tool on a touch area is calculated according to the returned touch information.

Abstract: An optical touch apparatus and a touch method thereof are provided. A plurality of light sensing units are disposed between a first scanning light source and a second scanning light source, wherein the light sensing units, the first scanning light source and the second scanning light source are disposed at a same side of a touch surface. A touch position of an input tool is determined according to an intensity of a scattered light generated by an input tool and sensed by the light sensing units and generated when a first scanning beam and a second scanning beam scan the input tool.

Abstract: An optical touch device defining a sensing area includes two scanning modules and a light detecting element. The scanning modules respectively disposed on terminals of a first side of the sensing area include light-emitting elements and reflective elements. The light-emitting element is used for emitting a detective light along a first pathway and the reflective element has a reflective surface for reflecting the detective light such that the detective light is emitted along a second pathway. There is an angle forming between the first side and the second pathway and the reflective surface changes a direction of the second pathway such that the detective light scans in the sensing area. The detective light has a first intensity and a second intensity, in which the first intensity is less than the second intensity. The light detecting element is used for receiving a detective light reflected by an object.

Abstract: A laser scanning device and a control method thereof are provided. The method includes: providing a control signal to an oscillating reflective mirror of the device; setting a frequency of the control signal gradually decreased from a maximal-setting-value of a resonant frequency of the mirror; judging whether a light detector receives a laser light reflected by the mirror according to an edge signal of the detector; judging whether a pulse width of the edge signal is equal to a predetermined pulse width when the detector receives the laser light: (1) increasing the frequency of the control signal when the pulse width of the edge signal is greater than the predetermined pulse width, (2) decreasing the frequency of the control signal when the pulse width of the edge signal is less than the predetermined pulse width. The time and labor for measuring the scanning frequency of the mirror may be saved.